Wrench.



W. s. ALLYN.

WRENCH.

'APPLIGA'IION FILED JUNE 1, 1912. 1,058,838, 7 Patented Apr. 15, 1913.

Emil-Q. Ezra-.12....

42 I. 77 i I wi l wcooeo v I w) a. I 'W UNITED STATES PATENT OFFICE.

WALTER S. ALLYN, OF 'IHOMPSONVILLE, ILLINOIS, ASSIGNOR 0F. ONE-HALF TOTHOMAS G. PUCKETT, OF THOMPSONVILLE, ILLINOIS.

WRENCH.

Specification of Letters Patent.

Application filed June 1, 1912.

Patented Apr. 15, 1913. Serial No. 701,072.

type embodying improved means for easily and quickly adjusting thesliding jaw and securely locking the same in its adjusted positionagainst liability of accidental release.

A further object of the invention is to provide a resllient locklngmember carried by the sliding jaw to engage teeth upon the wrench shank,a cam lever to force said locking member into engagement with the shank,and additional means 011 the sliding jaw with which said levercooperates whereby the lever is held in its effective locking position.

Still another object of the invention resides in the provision of awrench of the above type wherein is embodied features of extremedurability, convenience and efficiency in practical use and low cost ofmanufacture.

. With the above and other objects in view as will become apparent asthe description proceeds, the invention consists in certainconstructions, combination-s and arrangements of the parts that I shallhereinafter fully describe and claim.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawing, in which Figure 1 is aside elevation of a wrench constructed in accordance with the presentinvention showing the sliding jaw rigidly looked upon the wrench shank.Fig. 2 is an edge elevation of the wrench; and Fig. 8 is a detailperspective view of the cam lever.

Corresponding and like parts are referred to in the followingdescription and designated in the accompanying drawing by like therprovided with teeth 7 for engagement by the locking element mounted uponthe sliding jaw to belater referred to.

8 indicates the sliding wrench jaw which is provided with laterallyextending integral parallel arms 9 and 10 respectively, said armsextending upon opposite sides of the wrench shank 5. One end of alocking member 11 is riveted or otherwise rigidly fixed between the pairof jaw arms 10. The other end of this locking member is disposed betweenthe other pair of jaw arms 9, said member extending in parallel relationto the wrench shank 5. The intermediate portion of this locking memberisreduced in thickness as indicated at 12, whereby the desiredresiliency is obtained, said locking member being preferably formed ofsteel. The free end of this locking member between the arms 9 isprovidedupon one edge with teeth 13 for cooperative locking engagement with theteeth 7 on the wrench shank.

A lever 14: is provided with a cam 15 upon one end which is pivotallymounted between the jaw arms 9 upon the pin 16 which con- .nects saidarms. This cam is adapted to bear at its edge against the free end ofthe locking member 12 and force the toothed edge 13 thereof intoengagement with the teeth on the wrench shank, when said lever is forcedinwardly. The free end of this lever is adapted to be received betweenthe ends of the parallel arms 10 and in order to obviate liability ofaccidental or unintentional outward movement of said lever, which wouldrelease the sliding jaw, I provide a metal block 17 which is fixed tothe free end of a heavy leaf spring 18, the other end of said springbeing secured to the fixed end of the locking member 11. The block 17 isprovided with a beveled or inclined face 17 against which the end of thelever lt is adapted to bear as the same is forced to its lockingposition. This end of the lever is provided with a shoulder 19 withwhich the inner end wall of the block 17 is adapted to engage. Thus whenpressure is brought to bear against the fixed jaw of the wrench, thetendency of the cam lever 14: to move outwardly owing to the pressure ofthe locking member 12 against the cam 15, will be overcome. Theengagement of the block 17 with the free end of the lever 14 will alsoprevent outward movement of the lever to its release position if thesame is accidentally struck in the manipulation of the wrench.

The cam lever 14 is provided upon opposite sides of its intermediateportion with finger receiving recesses 20 whereby the lever may bereadily grasped and easily forced outwardly against action of thespring-pressed block 17, in which position of the lever the jaw 8 isreleased for sliding movement upon the wrench shank.

From the foregoing, it is thought that the construction and manner ofoperation of my improved wrench will be clearly understood.

The device is extremely simple in construction, efficient and reliablein practical use and may be produced at small cost.

While I have shown and described the preferred construction andarrangement of the various parts, it will be understood that theinvention is susceptible of considerable modification without departingfrom the essential features or sacrificing any of the advantagesthereof.

Having thus described the invention What is claimed is:

The herein described Wrench comprising a shank having teeth on one edgeand a fixed jaw on one end, a sliding jaw on said shank provided withspaced pairs of arms extending upon opposite sides of the shank, aresilient locking bar fixed at one of its ends between one pair of thearms adjacent to the toothed edge of the shank, a cam lever pivotallymounted in the other pair of arms to bear against the free end of thelocking bar and force the same into engagement with the wrench shank,said bar being provided with teeth to engage the teeth on said shank, aspring plate secured to the fixed end of the locking bar and disposedentirely between the first named pair of arms said plate having anangularly disposed resilient end portion extending downwardly andoutwardly, a block secured to the free end portion of said plate havinga beveled surface, said cam lever being adapted for disposal at its freeend between the arms when said lever is in its locking position, saidlever being provided on its free end with a shoulder to be engaged bythe block on said spring plate to retain said lever in its lockingposition against accidental outward movement to its release position.

In testimony whereof I hereunto afiix my signature in the presence oftwo witnesses.

WALTER S. ALLYN. Witnesses:

TAYLOR BOWMAN, L. B. HEARD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington,

